Vintage 10K White Gold Lozenge-Shaped Filigree Brooch
Brooch/Pin · White Gold - likely an alloy of gold, nickel, and zinc. The surface shows some darkening which may indicate a need for rhodium replating or is tarnish from the base metal alloys.
Purity: 10K (41.7% pure gold) as indicated by the '10K' stamp visible on the central interior plate. This purity is common for early-to-mid 20th-century durable jewelry.
Type
Brooch/Pin
Purity
10K (41.7% pure gold) as indicated by the '10K' stamp visible on the central interior plate. This purity is common for early-to-mid 20th-century durable jewelry.
Gold Type
White Gold - likely an alloy of gold, nickel, and zinc. The surface shows some darkening which may indicate a need for rhodium replating or is tarnish from the base metal alloys.
Weight
3.0 to 5.0 grams based on its size and openwork structure.
Description
This vintage lozenge-shaped brooch features a classic white gold geometric design typical of mid-century aesthetics. The openwork center is framed by a solid outer border with beaded edge detailing. The piece served as a versatile accessory for lapels, scarves, or hats during its era, reflecting a time when white gold was soaring in popularity as a transition from platinum.
Key Features
Lozenge (rhombus) shape, distinctive 10K stamp placement, and a rollover safety catch which was a significant security innovation for jewelry of this period.
Color & Finish
Dull silver-white with a visible patina. It has a high-polish base that has aged into a satin finish, with textured millgrain or beaded edges visible along the outer border.
Hallmarks & Stamps
A '10K' purity stamp is located on the center back plate within the diamond cutout. There is a small maker's mark or symbol to the left of the '10K' but it is too worn to identify specifically.
Dimensions Estimate
35mm length x 18mm width (approximate); Standard lapel size.
Gemstones & Inlays
The front likely contains small accent diamonds or seed pearls (not visible from the back), or it may be an all-metal geometric design. The central rectangular plate suggests a mounting point for a stone.
Clasp & Closure
C-clasp with a rotating safety lever (rollover clasp). The pin stem is made of a base metal or steel for strength, as evidenced by its different color and lack of tarnish.
Chain & Links
Not applicable; the structure uses a pin-and-hinge mechanism with a simple hinge block at the top and a safety catch at the bottom.
Craftsmanship Details
Die-struck components with hand-finished assembly. The hinge and clasp are soldered with visible precision, typical of mass-produced jewelry from reputable mid-tier manufacturers of the time.
Authentication Indicators
The '10K' stamp is consistent in font and depth with mid-century manufacturing. The darkening/tarnish is consistent with a 41.7% gold alloy containing higher concentrations of copper/silver/nickel.
Origin & Maker
Likely American or Canadian based on the '10K' notation style; the specific workshop is unknown due to the wear on the maker's logo.
Era & Period
Later Art Deco or Retro era (late 1930s to 1950s). The lozenge shape and the style of the safety catch are characteristic of this period.
Age Estimate
Circa 1940-1950. The transition from pure Art Deco filigree to more solid geometric shapes suggests a mid-century production date.
Cultural Significance
Brooches were essential components of women's professional and social attire in the mid-20th century, often used to display personal style in a more conservative fashion landscape.
Condition Notes
Good/Vintage condition. There is surface tarnish and oxidation (typical for 10K alloys), minor surface scratches, and some evidence of light bending in the pin stem. Structural integrity is safe.
Value Estimate
$150.00 - $250.00. Value is primarily derived from the gold melt weight (~$100-140) plus a modest vintage premium for the design and era.
Care & Maintenance
Clean gently with a soft toothbrush and mild dish soap in warm water. Avoid ultrasonic cleaners if stones are present. Consider a professional rhodium dip to restore the bright white luster.
Similar Items
Mid-century silver filigree brooches (which would lack the 10K stamp) or 14K Art Deco bar pins (which are usually more elongated and carry a higher gold content).
Interesting Facts
During WWII, platinum was declared a strategic metal for military use, leading to a massive spike in the production of white gold jewelry in the United States and UK as a luxury alternative.